Controls - 
SJE-Rhombus VARIOspeed

VARIOspeed constant-pressure controls from SJE-Rhombus offer an economical, pre-engineered solution for variable-speed pumping applications, including submersible deep well, booster and irrigation pumps. They have a factory-programmed variable-frequency drive in a NEMA 1 or NEMA 3R enclosure with a user-friendly keypad and backlit display for easy installation and setup. Both styles are available in 1.5 through 20 hp, and include the LCD display. They automatically control the pump speed to maintain a constant discharge pressure. The visualization and configuration of the system is simplified using pump terminology to allow non-VFD experts a greater comfort level with the drive. The system offers PID control, adjustable electronic overload, auto-start on pressure drop (adjustable) and auto-stop on low Hz (no-flow/sleep mode). They include a 0 to 200 psi pressure transducer, and are UL/cUL listed. 888/342-5753;


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